science
Grade-7
Easy
Question
What kind of motion do the blades of a fan (switched on) make?
a) Rotational motion
b) Periodic motion
c) Random motion
d) Oscillatory motion
- Only a is correct
- Only b and d are correct
- Only a and b are correct
- Only b is correct
Hint:
Only a is correct among the other options.
The correct answer is: Only a is correct
Blades of fan revolves about the center of fan and so, the blades exhibit rotational motion.
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a. Tie a thread to the first nail and then tie it to the other nail. Measure the length of the thread between those two points using a ruler.
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